Improvement in steam-engine governors



PATENT@ MAR 7 11871 LLI. Y0/eda15 Q01/677202:'

f ittiidi hmatnd ditte sition in which they move.

bje'ct of my invention. f By the `use ofthe 'cam-shaped segmental gears on 4GI'IARLES liiyoolvnit, or INDIANAPOLIS, .IN-DIANA.

Letters Patent N.' 112,420, dem man?, 187i.

IMPRovrMeNT IN'sTEAM-ENGINE GovERNoRs.

The Schedule referred to in Bleue Letters Batam: un! making pa'xt of the lerne,

.To all whom it may concern:

Be it known that I, CHARLES A; Donna, ofvIn- 'dianapolis in the county of Marion and State of In diana, have invented 'a new and improved Governor for Steam-Engines 'and I do hereby declare that the following is a full, clear, and exact description thereof, which will enableI others skilled v'in the art toniake and use the same, reference being had to the accompanying drawing forming part-of this specification.

The drawing represents a side view, partly in section, of my improved governor.

This invention relates to a new method of segulating the movement of the balls of a steamgovernor :speed to retain their assumed position, since proportionately more power is required to increase the expanso'n than was employed to bringt-hem to the po- Ordinary governors are therefore unreliable, as their valves are not promptly closed under a high rate of speed, at .least not -as promptly as they could be were the vis 'inertia oi' the halls not in excess to the difference of power developed by increased rotatiom To graduate this difference of power is the mainthe ball-'arms the leverage of the latter, as far as their action upon the valve is concerned, decreases with the .increased expansion of the balls, and the resistance to be overcomeby further elevation and expansion of the balls is increased in the same rate A in the drawing represents the valve-rod of a steamengiue governor, ca 'ying at its upper. enda wedge-shaped or tapering b ook, a; This bloclr` is narrower at its upper end, and has its inclined edges `toothe d, as shown.

B B are the ball-arms, carrying the .balls 0,and pivoted, by pins, b ,12, to the shell or 'frame of the gow ernor.

The inner ends of the arms B carry toothed eccenA tric segments or canis, l d, that mesh into the oppov site edges of the block a.

I The curves of these two edges are struck frommenters, e, that are higher and outward from the pivots b,

as indicated by dotted lines in the drawing; thereby the distance between the pivot and the upper tooth ot each segment d vexceeds by so much that between said pivot and the lower tooth as the upper tooth of the rod a is nearer-to the axis of the val'v'efrod than the lower tooth of sadbiock; consequently the leverage of the ball-arms decreases the nearer' the cam works toward its upper tooth.

The more, consequently, the balls areiexpanded the less will become their power'as applied to the valverod, the movement of' which is' thus increased at the same rate at which the resistance to be overcome by the balls in furthei'expansion is augmented.

Having thus described my invention,

I claim as'new and desire to secure -by Letters Patent- The segmental-toothed cams d, applied to the ballarm's of a governor, and connected with the toothed tapering block a on the valve-rod, substantially as herein shown and'described.

OHAS.. A. CONDE.

Witnesses:

' GEO. W. Manns,

'l. B. '.lldosrrrm.A 

